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From: Christoph Hellwig <hch@infradead.org>
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Subject: Re: [Bridge] linux-next: umh: fix processed error when
 UMH_WAIT_PROC is used seems to break linux bridge on s390x (bisected)
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Date: Wed, 24 Jun 2020 14:43:30 -0000
To: Christian Borntraeger <borntraeger@de.ibm.com>
Cc: ast@kernel.org, jarkko.sakkinen@linux.intel.com, philipp.reisner@linbit.com, dhowells@redhat.com, keyrings@vger.kernel.org, mcgrof@kernel.org, christian.brauner@ubuntu.com, yangtiezhu@loongson.cn, linux-s390 <linux-s390@vger.kernel.org>, bridge@lists.linux-foundation.org, jmorris@namei.org, kuba@kernel.org, serge@hallyn.com, keescook@chromium.org, nikolay@cumulusnetworks.com, roopa@cumulusnetworks.com, josh@joshtriplett.org, slyfox@gentoo.org, viro@zeniv.linux.org.uk, axboe@kernel.dk, bfields@fieldses.org, linux-nfs@vger.kernel.org, chainsaw@gentoo.org, ravenexp@gmail.com, gregkh@linuxfoundation.org, markward@linux.ibm.com, linux-kernel@vger.kernel.org, linux-security-module@vger.kernel.org, chuck.lever@oracle.com, netdev@vger.kernel.org, linux-fsdevel@vger.kernel.org, lars.ellenberg@linbit.com, davem@davemloft.net

On Wed, Jun 24, 2020 at 01:11:54PM +0200, Christian Borntraeger wrote:
> Does anyone have an idea why "umh: fix processed error when UMH_WAIT_PROC is used" breaks the
> linux-bridge on s390?

Are we even sure this is s390 specific and doesn't happen on other
architectures with the same bridge setup?